first sketch at calculation test

diff --git a/t/calculate.t b/t/calculate.t
new file mode 100644 (file)
index 0000000..0726322
--- /dev/null
+++ b/t/calculate.t
@@ -0,0 +1,47 @@
+use strict;
+use warnings;
+use Test::More qw(no_plan);
+
+use autobox::DateTime::Duration;
+use signatures;
+
+BEGIN {
+  use_ok 'IronMunger::Post';
+  use_ok 'IronMunger::Calculate';
+}
+
+sub named_eq ($test_name, $sub_name, $expected, @posts) {
+  my $sub_ref = IronMunger::Calculate->can($sub_name);
+  my $sub_description = join(' ', split '_', $sub_name);
+  cmp_ok(
+    $sub_ref->(@posts), '==', $expected,
+    "${test_name}: ${expected} ${sub_description}",
+  );
+}
+
+sub case ($name_spec, $case, $expect) {
+  my $name = join(' ', map ucfirst, split '_', $name_spec);
+  my @posts = map { IronMunger::Post->new(at => $_) } @$case;
+  foreach my $test (sort keys %$expect) {
+    named_eq($name, $test, $expect->{$test}, @posts);
+  }
+}
+
+sub expect (%expect) {
+  +{
+    successful_sequential_posts => $expect{sequential},
+    days_remaining_to_post => $expect{remaining},
+  };
+}
+
+case two_posts_ok =>
+  [ 5->days->ago, 13->days->ago ],
+  expect
+    sequential => 2,
+    remaining => 5;
+
+case two_posts_too_far_apart =>
+  [ 5->days->ago, 20->days->ago ],
+  expect
+    sequential => 1,
+    remaining => 5;